US4782243A - Pulse generator - Google Patents

Pulse generator Download PDF

Info

Publication number
US4782243A
US4782243A US07/122,436 US12243687A US4782243A US 4782243 A US4782243 A US 4782243A US 12243687 A US12243687 A US 12243687A US 4782243 A US4782243 A US 4782243A
Authority
US
United States
Prior art keywords
pulse generator
housing
switching plunger
switching
plunger
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
US07/122,436
Inventor
Wolfgang Rosl
Jochen Rose
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Alcatel Lucent Deutschland AG
Original Assignee
Standard Elektrik Lorenz AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Standard Elektrik Lorenz AG filed Critical Standard Elektrik Lorenz AG
Assigned to STANDARD ELEKTRIK LORENZSTRASSE 10 7000 STUTTGART-40 GERMANY reassignment STANDARD ELEKTRIK LORENZSTRASSE 10 7000 STUTTGART-40 GERMANY ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: ROSE, JOCHEN, ROSL, WOLFGANG
Application granted granted Critical
Publication of US4782243A publication Critical patent/US4782243A/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S5/00—Semiconductor lasers
    • H01S5/06—Arrangements for controlling the laser output parameters, e.g. by operating on the active medium
    • H01S5/068—Stabilisation of laser output parameters
    • H01S5/0683—Stabilisation of laser output parameters by monitoring the optical output parameters
    • H01S5/06832—Stabilising during amplitude modulation
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S5/00—Semiconductor lasers
    • H01S5/04—Processes or apparatus for excitation, e.g. pumping, e.g. by electron beams
    • H01S5/042—Electrical excitation ; Circuits therefor
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S5/00—Semiconductor lasers
    • H01S5/06—Arrangements for controlling the laser output parameters, e.g. by operating on the active medium
    • H01S5/068—Stabilisation of laser output parameters
    • H01S5/0683—Stabilisation of laser output parameters by monitoring the optical output parameters
    • H01S5/06835—Stabilising during pulse modulation or generation

Definitions

  • the present invention relates to a pulse generator as set forth in the preamble of claim 1.
  • Pulse generators of this kind with only one contact are known as so-called keyswitches. In such switches, at least one contact is opened or closed by depressing the switching plunger.
  • the object of the present invention is to design a pulse generator so that several switching positions are possible, and that a contact can be actuated in several or all possible switching positions.
  • FIG. 1 shows the principle of the pulse generator in a top view
  • FIGS. 2, 3a and 3b show an embodiment for actuating several contacts in one plane
  • FIG. 4 shows part of a contact plate
  • FIG. 5 shows a pulse generator in a sectional side view
  • FIG. 6 is a sectional top view
  • FIG. 7 is a section taken along line A-B of FIG. 5 in the rest position of the switching plunger
  • FIG. 8 is a section taken along line A-B of FIG. 5 in a rotated position of the switching plunger
  • FIG. 9 is a top view as in FIG. 6 but in a pulled position of the switching plunger.
  • FIG. 10 is a front view of the pulse generator with the housing closed.
  • the reference numerals 1, 1.1 to 1.8 designate fixed contacts which face movable contact springs 2, 2.1 to 2.8 located at a distance therefrom.
  • a switching plunger 3, indicated in FIG. 1 by broken lines, is provided with an actuating member 4. The latter projects radially, i.e., downwardly in the position shown in FIG. 1.
  • the plunger 3 is supported in a housing (not shown in FIG. 1) or a part of a housing so as to be slidable in the direction of its longitudinal axis 5 (arrow 6) and rotatable about its longitudinal axis 5 (arrow 7).
  • the plunger 3 can be fixed in its rest position by a tension spring 8.
  • the rest position is the intermediate position shown in FIG. 1.
  • the tension spring 8 is mounted perpendicular to the longitudinal axis 5 and extends through a hole of the plunger 3, so that it can pull the plunger 3 from any possible pulled, depressed and/or rotated position back to the rest position. It thus acts as a restoring spring.
  • the movable contact spring 2.7 can be forced against the fixed contact 1.7 by pulling the actuating member 4 upwards in the plane of the paper, thus closing the contact. After release of the plunger 3, the latter returns to the rest position under the action of the tension spring 8.
  • the contact 2.8, 1.8 can be closed in similar fashion as long as the necessary pressure is maintained.
  • the actuating member 4 can close the contact 2.2, 1.2 or 2.5, 1.5, depending on the direction of rotation.
  • the contact 2.1, 1.1 or 2.4, 1.4 can be operated by additional pulling during rotation, and the contact 2.3, 1.3 or 2.6, 1.6 by depression and rotation.
  • At least one movable contact spring here the contact spring 2.7
  • two contacts can then be actuated simultaneously.
  • FIG. 3a this is shown schematically for the contacts 2.7, 1.7 and 2.4, 1.4.
  • the two contacts 2.7, 1.7 and 2.4, 1.4 can be actuated one after the other in one pulling plane.
  • FIG. 4 shows an embodiment of the movable contact springs 2 at a common contact plate 10.
  • the contact springs 2 are bent at approximately right angles to the plane of the contact plate 10 and project inwardly in the pulse generator.
  • FIGS. 5 to 10 show a practical embodiment.
  • the pulse generator has a suitably closed housing 11.
  • the latter consists of a part 11.1, which receives the contact plate 10, and a cover part 11.2.
  • the housing 11 has a preferably externally closed bushing 12 into which the plunger 3 projects with a centering pin 13, which is slidably and rotatably supported in the bushing 12.
  • the end of the plunger 3 opposite the centering pin 13, the end 14, is rotatably and slidably supported in a bearing opening 11.3 of, and protrudes from, the housing 11.
  • the parting line 15 between the housing part 11.1 and the cover part 11.2 runs in the direction of the longitudinal axis 5 of the plunger 3 and centrally through the bearings, namely the bushing 12 and the bearing opening 11.3. This permits the plunger 3 to be fitted in a simple manner by insertion.
  • the tension spring 8 is provided with an eye hook at each of its ends 8.1 and 8.2. Attached to or formed on the housing part 11.1 are pins 16 over which the ends 8.1 and 8.2 can be slipped to mount the tension spring 8.
  • the tension spring extends through a cross hole 17 of the plunger 3.
  • the cross hole 17 preferably widens outwardly in the form of a funnel (FIG. 6).
  • a locking projection 18 may be provided on the plunger 3, preferably on the side opposite the actuating member 4. In at least one switching position, it extends into a recess 19 in the housing part 11.1 of the cover part 11.2 which is shaped so that the plunger 3 can be rotated, but can only be moved longitudinally. In another switching position, a wider recess 20 may be provided in the housing part 11.1 or the cover part 11.2. If, in this switching position, the locking projection 18 is in the wider recess 20, the plunger 3 can be rotated.
  • the sidewalls 20.1 and 20.2 of the wider recess 20 serve as stops for the projection 18, and thus as means for limiting the rotation range of the plunger 3 (cf. FIG. 8).
  • the projection 18 may also be provided on the housing 11, in which case the recesses 19 and 20 are in the plunger 3.
  • the contact plate 10 has at least one terminal pin 21.10, which is brought out through a wall 22 of the housing.
  • the fixed contacts 1.1 to 1.8 can be contacted from outside via terminals pins 21 passing through a wall of the housing, e.g., the wall 22.
  • all terminals pins 21 and 21.10 protrude from the housing 11 on one side, thus permitting simple assembly and contacting by plugging. They are preferably arranged with a given grid spacing.
  • the terminal pins 21 and 21.10 are designed as flat contacts. In this case, the surface of at least one of the same may be contained in a plane other than that of another. This guarantees proper insertion even if the terminal pins are arranged symmetrically.
  • FIG. 8 shows the pulse generator with the plunger 3 rotated out of its rests position, and the resulting S-bend of the tension spring 8.
  • FIG. 9 shows the pulled position of the plunger 3 and the resulting sag of the tension spring 8. A corresponding sag is obtained if pressure is exerted on the plunger 3. If the plunger 3 is pulled or depressed and simultaneously rotated, the tension spring 8 will be bent in the shape of a S and simultaneously caused to sag. After release of the plunger 3, the tension spring 8 pulls the plunger back to its rest position.
  • the pins 16 for fastening the ends 8.1 and 8.2 of the tension spring 8 are provided on one part 11.1 of the housing, while the other part, i.e., the cover part 11.2 is provided with blind holes 23 in the areas of the pins 16.
  • the pins 16 extend into the blind holes 23 with little play.
  • a gap 26 is formed between the basal plane 24 of the pin and the surface 25 surrounding the blind hole 23. Its height is at least equal to the thickness of the ends 8.1 and 8.2 of the tension spring 8.
  • the basal planes of the pins are preferably on or approximately on a level with the parting line 15.

Landscapes

  • Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Optics & Photonics (AREA)
  • Semiconductor Lasers (AREA)
  • Optical Communication System (AREA)
  • Lasers (AREA)
  • Push-Button Switches (AREA)

Abstract

A pulse generator with a pin-shaped switching plunger for actuating at least one contact is so designed that many switching positions are possible. It is characterized in that the switching plunger (3), which is guided in a housing, is slidable in the direction of and rotatable about its longitudinal axis (5), and that the switching plunger (3) is provided with at least one actuating member (4) which can enter into nonpositive engagement with at least one contact (2.1 to 2.8 and 1.1 to 1.8) both in any of the longitudinally shifted positions and in any of the rotated positions.

Description

DESCRIPTION
The present invention relates to a pulse generator as set forth in the preamble of claim 1.
Pulse generators of this kind with only one contact are known as so-called keyswitches. In such switches, at least one contact is opened or closed by depressing the switching plunger.
The object of the present invention is to design a pulse generator so that several switching positions are possible, and that a contact can be actuated in several or all possible switching positions.
This object is attained by the features set forth in the characterizing part of claim 1. In this manner, several longitudinally shifted and at least two rotated switch positions can be obtained without a major design effort. According to an advantageous feature of the invention, only a single tension spring is necessary to restore the switching plunger from any switching position to the rest position.
Further advantageous details of the invention are given in the subclaims and will now be described with the aid of the embodiments illustrated in the accompanying drawings, in which:
FIG. 1 shows the principle of the pulse generator in a top view;
FIGS. 2, 3a and 3b show an embodiment for actuating several contacts in one plane;
FIG. 4 shows part of a contact plate;
FIG. 5 shows a pulse generator in a sectional side view;
FIG. 6 is a sectional top view;
FIG. 7 is a section taken along line A-B of FIG. 5 in the rest position of the switching plunger;
FIG. 8 is a section taken along line A-B of FIG. 5 in a rotated position of the switching plunger;
FIG. 9 is a top view as in FIG. 6 but in a pulled position of the switching plunger, and
FIG. 10 is a front view of the pulse generator with the housing closed.
The reference numerals 1, 1.1 to 1.8 designate fixed contacts which face movable contact springs 2, 2.1 to 2.8 located at a distance therefrom. A switching plunger 3, indicated in FIG. 1 by broken lines, is provided with an actuating member 4. The latter projects radially, i.e., downwardly in the position shown in FIG. 1. The plunger 3 is supported in a housing (not shown in FIG. 1) or a part of a housing so as to be slidable in the direction of its longitudinal axis 5 (arrow 6) and rotatable about its longitudinal axis 5 (arrow 7).
The plunger 3 can be fixed in its rest position by a tension spring 8. The rest position is the intermediate position shown in FIG. 1. The tension spring 8 is mounted perpendicular to the longitudinal axis 5 and extends through a hole of the plunger 3, so that it can pull the plunger 3 from any possible pulled, depressed and/or rotated position back to the rest position. It thus acts as a restoring spring. In the schematic representation of FIG. 1, the movable contact spring 2.7 can be forced against the fixed contact 1.7 by pulling the actuating member 4 upwards in the plane of the paper, thus closing the contact. After release of the plunger 3, the latter returns to the rest position under the action of the tension spring 8. By depressing the plunger 3, the contact 2.8, 1.8 can be closed in similar fashion as long as the necessary pressure is maintained.
If the plunger 3 is rotated out of its rest position, the actuating member 4 can close the contact 2.2, 1.2 or 2.5, 1.5, depending on the direction of rotation.
The contact 2.1, 1.1 or 2.4, 1.4 can be operated by additional pulling during rotation, and the contact 2.3, 1.3 or 2.6, 1.6 by depression and rotation.
According to an advantageous feature of the invention, which is shown in FIGS. 2 and 3, at least one movable contact spring, here the contact spring 2.7, has at least one lateral actuating extension 9 which extends into the range of actuation of an adjacent contact, here the movable contact springs 2.1 and 2.4. By pulling and simultaneous rotation, two contacts can then be actuated simultaneously. In FIG. 3a, this is shown schematically for the contacts 2.7, 1.7 and 2.4, 1.4. With slanting extensions 9 as shown in FIG. 3b, the two contacts 2.7, 1.7 and 2.4, 1.4 can be actuated one after the other in one pulling plane.
FIG. 4 shows an embodiment of the movable contact springs 2 at a common contact plate 10. The contact springs 2 are bent at approximately right angles to the plane of the contact plate 10 and project inwardly in the pulse generator.
FIGS. 5 to 10 show a practical embodiment. The pulse generator has a suitably closed housing 11. The latter consists of a part 11.1, which receives the contact plate 10, and a cover part 11.2. The housing 11 has a preferably externally closed bushing 12 into which the plunger 3 projects with a centering pin 13, which is slidably and rotatably supported in the bushing 12. The end of the plunger 3 opposite the centering pin 13, the end 14, is rotatably and slidably supported in a bearing opening 11.3 of, and protrudes from, the housing 11. The parting line 15 between the housing part 11.1 and the cover part 11.2 runs in the direction of the longitudinal axis 5 of the plunger 3 and centrally through the bearings, namely the bushing 12 and the bearing opening 11.3. This permits the plunger 3 to be fitted in a simple manner by insertion.
The tension spring 8 is provided with an eye hook at each of its ends 8.1 and 8.2. Attached to or formed on the housing part 11.1 are pins 16 over which the ends 8.1 and 8.2 can be slipped to mount the tension spring 8. The tension spring extends through a cross hole 17 of the plunger 3. The cross hole 17 preferably widens outwardly in the form of a funnel (FIG. 6).
A locking projection 18 may be provided on the plunger 3, preferably on the side opposite the actuating member 4. In at least one switching position, it extends into a recess 19 in the housing part 11.1 of the cover part 11.2 which is shaped so that the plunger 3 can be rotated, but can only be moved longitudinally. In another switching position, a wider recess 20 may be provided in the housing part 11.1 or the cover part 11.2. If, in this switching position, the locking projection 18 is in the wider recess 20, the plunger 3 can be rotated. The sidewalls 20.1 and 20.2 of the wider recess 20 serve as stops for the projection 18, and thus as means for limiting the rotation range of the plunger 3 (cf. FIG. 8). The projection 18 may also be provided on the housing 11, in which case the recesses 19 and 20 are in the plunger 3.
The contact plate 10 has at least one terminal pin 21.10, which is brought out through a wall 22 of the housing. The fixed contacts 1.1 to 1.8 can be contacted from outside via terminals pins 21 passing through a wall of the housing, e.g., the wall 22. Preferably, all terminals pins 21 and 21.10 protrude from the housing 11 on one side, thus permitting simple assembly and contacting by plugging. They are preferably arranged with a given grid spacing. In a preferred embodiment, the terminal pins 21 and 21.10 are designed as flat contacts. In this case, the surface of at least one of the same may be contained in a plane other than that of another. This guarantees proper insertion even if the terminal pins are arranged symmetrically.
FIG. 8 shows the pulse generator with the plunger 3 rotated out of its rests position, and the resulting S-bend of the tension spring 8. FIG. 9 shows the pulled position of the plunger 3 and the resulting sag of the tension spring 8. A corresponding sag is obtained if pressure is exerted on the plunger 3. If the plunger 3 is pulled or depressed and simultaneously rotated, the tension spring 8 will be bent in the shape of a S and simultaneously caused to sag. After release of the plunger 3, the tension spring 8 pulls the plunger back to its rest position.
According to a further advantageous feature of the invention, the pins 16 for fastening the ends 8.1 and 8.2 of the tension spring 8 are provided on one part 11.1 of the housing, while the other part, i.e., the cover part 11.2 is provided with blind holes 23 in the areas of the pins 16. When the parts 11.1 and 11.2 of the housing are put together, the pins 16 extend into the blind holes 23 with little play. In addition, a gap 26 is formed between the basal plane 24 of the pin and the surface 25 surrounding the blind hole 23. Its height is at least equal to the thickness of the ends 8.1 and 8.2 of the tension spring 8. Thus, the tension spring 8 is securely held in position. The basal planes of the pins are preferably on or approximately on a level with the parting line 15.

Claims (16)

We claim:
1. Pulse generator comprising a pin-shaped switching plunger capable of actuating at least one contact, characterized in that the switching plunger (3), which is guided in a housing (11), is slidable in the direction of and rotatable about its longitudinal axis (5), and that the switching plunger (3) is provided with at least one actuating member (4) which can enter into nonpositive engagement with at least one contact (2.1 to 2.8 and 1.1 to 1.8) both in any of the longitudinally shifted positions and in any of the rotated positions.
2. A pulse generator as claimed in claim 1, characterized in that tension spring (8) extends through the switching plunger (3) perpendicular to the longitudinal direction of the switching plunger (3) and is held in the housing (11) at both ends (8.1, 8.2) and that the tension spring (8) is designed as a restoring spring for restoring the switching plunger both from any pulled or depressed position and from any rotated position.
3. A pulse generator as claimed in claim 1, characterized in that the rest position of the switching plunger (3) is an intermediate switching position from which the switching plunger (3) can be moved to another switching position by pulling or depression and/or rotation.
4. A pulse generator as claimed claim 1, characterized in that the switching plunger (3) or the housing (11) has a locking projection (18) which, in at least one of the longitudinally shifted positions of the switching plunger (3), engages a recess (19) in the housing (11) or the switching plunger (3), respectively, which recess prevents any rotation of the switching plunger (3).
5. A pulse generator as claimed in claim 1, characterized in that several movable contacts (2.1 to 2.8) are arranged on a common contact plate (10) fixed in the housing (11; 11.1) and that the contact plate (10) has at least one terminal pin (21.10) which passes through a wall (22) of the housing and can be contacted from outside.
6. A pulse generator as claimed in claim 5, characterized in that the movable contacts (2 1 to 2.8) are angled perpendicular to the plane of the contact plate (10) and project into the housing (11).
7. A pulse generator as claimed in claim 4, characterized in that the actuating member (4) is diametrically opposite to the locking projection (18).
8. A pulse generator as claimed in claim 1, characterized in that the housing (11) consists of two parts, and that the parting line (15) runs in the direction of the longitudinal axis (5) of the switching plunge (3) and centrally through the bearings (12; 11.3) for the switching plunger (3).
9. A pulse generator as claimed in claim 1, characterized in that one end of the switching plunger (3) is provided with a centering pin (13) which is slidably and rotatably guided in a bushing (12).
10. A pulse generator as claimed in claim 9, characterized in that the bushing (12) is hermetically sealed on the outside.
11. A pulse generator as claimed in claim 9, characterized in that on the side opposite the centering pin (13), the switching plunger (3) is rotatably and slidably supported in the housing (11) and protrudes from the housing (11).
12. A pulse generator as claimed in claim 1, characterized in that the terminal pins (21; 21.10) are all provided on one side and arranged with a given grid spacing.
13. A pulse generator as claimed in claim 1, characterized in that the terminal pins (21; 21.10) are designed as flat contacts, and that the surface of at least one terminal pin (21; 21.10) lies in a plane other than that of the other terminal pins.
14. A pulse generator as claimed in claim 1, characterized in that at least one movable contact spring (2.1 to 2.8) has an actuating extension (9) which extends into the range of actuation of an adjacent contact, so that said movable contact spring can be actuated together with the movable contact spring of the adjacent contact.
15. A pulse generator as claimed in claim 1, characterized in that pins (16) are provided at one part (11.1) of the housing, that the other part (11.2) of the housing has blind holes (23) into which the pins (16) extend with little play, and that between the basal plane (24) of the respective pin and the surrounding surface (25) of the blind hole (23), there is a gap having a height equal to the thickness of the spring ends (8.1, 8.2).
16. A pulse generator as claimed in claim 15, characterized in that the basal planes (24) of the pins are at least approximately on a level with the parting line (15) of the housing parts (11.1; 11.2).
US07/122,436 1986-03-18 1987-11-19 Pulse generator Expired - Fee Related US4782243A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19863608930 DE3608930A1 (en) 1986-03-18 1986-03-18 METHOD FOR REGULATING THE OPTICAL PERFORMANCE OF A LASER AND CIRCUIT FOR IMPLEMENTING THE METHOD
DE3608930 1986-03-18

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US07/165,090 Continuation-In-Part US4837456A (en) 1987-03-07 1988-03-07 Pulse generator

Publications (1)

Publication Number Publication Date
US4782243A true US4782243A (en) 1988-11-01

Family

ID=6296599

Family Applications (2)

Application Number Title Priority Date Filing Date
US07/027,445 Expired - Lifetime US4833680A (en) 1986-03-18 1987-03-18 Method of controlling the optical power output of a laser, and circuit for carrying out the method
US07/122,436 Expired - Fee Related US4782243A (en) 1986-03-18 1987-11-19 Pulse generator

Family Applications Before (1)

Application Number Title Priority Date Filing Date
US07/027,445 Expired - Lifetime US4833680A (en) 1986-03-18 1987-03-18 Method of controlling the optical power output of a laser, and circuit for carrying out the method

Country Status (6)

Country Link
US (2) US4833680A (en)
EP (1) EP0237922B1 (en)
AT (1) ATE91052T1 (en)
AU (1) AU593889B2 (en)
DE (2) DE3608930A1 (en)
ES (1) ES2042512T3 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9640945B2 (en) 2013-02-13 2017-05-02 Siemens Aktiengesellschaft Method and arrangement for actuating a wavelength-tunable laser diode in a spectrometer

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NZ218022A (en) * 1985-10-22 1991-01-29 Fujitsu Ltd Compensated regulation of light output from semiconductor laser
EP0293008B1 (en) * 1987-05-29 1994-04-27 Nec Corporation A method and apparatus for an oscillation frequency separation among a plurality of laser devices
US5014286A (en) * 1989-10-10 1991-05-07 At&T Bell Laboratories Delay generator
US5091797A (en) * 1989-11-13 1992-02-25 Siemens Aktiengesellschaft Method and apparatus for modulation current regulation for laser diodes
US4980891A (en) * 1989-12-22 1990-12-25 Bell Communications Research, Inc. Clocked optical regenerator and other optoelectronic functional circuits
DE4030995A1 (en) * 1990-10-01 1992-01-09 Ant Nachrichtentech Laser-diode for fast data transmission with servo output - uses photodiode to monitor and set threshold and modulator currents
US5508845A (en) * 1990-10-18 1996-04-16 Telstra Corporation Limited Quasi-soliton communication system
DE4110095C2 (en) * 1991-03-27 1998-02-12 Draegerwerk Ag Method for gas spectroscopic measurement of the concentration of a gas component
GB2258753B (en) * 1991-08-15 1995-02-15 Northern Telecom Ltd Injection laser modulation
DE4128671A1 (en) * 1991-08-29 1993-04-01 Sennheiser Electronic Transmission of information signal over optical fibre and - converting information signal in first step into HF, carrierless signal, limited to one polarity plane
JPH05244094A (en) * 1992-02-26 1993-09-21 Toshiba Corp Optical transmission equipment
FR2689697B1 (en) * 1992-04-03 1994-05-20 Thomson Hybrides MODULATED POWER SERVO CIRCUIT EMITTED BY THE SEMICONDUCTOR LASER.
JP3226624B2 (en) * 1992-09-24 2001-11-05 日本オプネクスト株式会社 Laser diode drive circuit and optical transmission device
DE19615630A1 (en) * 1996-04-20 1997-10-23 Tino Petsch Control apparatus for laser machining process power
US5754577A (en) * 1996-07-23 1998-05-19 Broadband Communications Products, Inc. Compensation for variations in temperature and aging of laser diode by use of small signal, square-law portion of transfer function of diode detection circuit
US6188498B1 (en) 1998-07-15 2001-02-13 Maxim Integrated Products, Inc. Local control for burst mode optical transmitters
DE19843206A1 (en) * 1998-09-16 2000-04-20 Siemens Ag Optical transmitter for multi-channel optical data transmission
JP3778119B2 (en) * 2002-04-01 2006-05-24 日本電気株式会社 Power control apparatus and method for optical disk recording
EP3002891A4 (en) * 2013-06-29 2016-04-13 Huawei Tech Co Ltd Optical signal monitoring method, signal monitoring device and optical network system
JP2016096221A (en) * 2014-11-13 2016-05-26 住友電気工業株式会社 Drive circuit

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1109762B (en) * 1958-03-14 1961-06-29 Haller & Co E counter
DE1765607A1 (en) * 1967-06-23 1971-07-29 Naimer H L Electrical switchgear
US3784746A (en) * 1971-07-06 1974-01-08 R Hess Single actuator for effecting multiple controls
US3821498A (en) * 1972-05-30 1974-06-28 Usm Corp Control pendants
CH558560A (en) * 1971-06-23 1975-01-31
US3919506A (en) * 1974-05-03 1975-11-11 Westinghouse Electric Corp Detachably mounted cam operator for multiple reciprocating contact switch assembly

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2025121B (en) * 1978-07-06 1982-05-19 Post Office Stabilisation of injection lasers
FR2448274A1 (en) * 1979-02-02 1980-08-29 Thomson Csf Supply circuit for semiconductor laser or LED - protects against overload using photocurrent to control series transistor
NL7907683A (en) * 1979-10-18 1981-04-22 Philips Nv CONTROL CHAIN FOR A LASER RATING CURRENT.
US4277846A (en) * 1979-12-27 1981-07-07 Bell Telephone Laboratories, Incorporated Circuit for stabilizing the output of an injection laser
FR2476945A1 (en) * 1980-02-22 1981-08-28 Lignes Telegraph Telephon DEVICE FOR AUTOMATICALLY CONTROLLING OUTPUT POWER OF TRANSMITTER MODULE FOR OPTICAL FIBER TRANSMISSION SYSTEM
FR2494514A1 (en) * 1980-11-14 1982-05-21 Lignes Telegraph Telephon DEVICE FOR STABILIZING THE OUTPUT POWER OF A TRANSMITTER MODULE FOR AN OPTICAL FIBER TRANSMISSION SYSTEM
FR2526554B1 (en) * 1982-05-06 1985-06-07 Telecommunications Sa METHOD FOR REGULATING LUMINOUS INFORMATION TRANSMITTERS AND THE IMPLEMENTING SYSTEM
NZ218022A (en) * 1985-10-22 1991-01-29 Fujitsu Ltd Compensated regulation of light output from semiconductor laser
JP3593795B2 (en) * 1996-06-21 2004-11-24 セイコーエプソン株式会社 Printer paper feeder

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1109762B (en) * 1958-03-14 1961-06-29 Haller & Co E counter
DE1765607A1 (en) * 1967-06-23 1971-07-29 Naimer H L Electrical switchgear
CH558560A (en) * 1971-06-23 1975-01-31
US3784746A (en) * 1971-07-06 1974-01-08 R Hess Single actuator for effecting multiple controls
US3821498A (en) * 1972-05-30 1974-06-28 Usm Corp Control pendants
US3919506A (en) * 1974-05-03 1975-11-11 Westinghouse Electric Corp Detachably mounted cam operator for multiple reciprocating contact switch assembly

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9640945B2 (en) 2013-02-13 2017-05-02 Siemens Aktiengesellschaft Method and arrangement for actuating a wavelength-tunable laser diode in a spectrometer

Also Published As

Publication number Publication date
ATE91052T1 (en) 1993-07-15
EP0237922B1 (en) 1993-06-23
EP0237922A2 (en) 1987-09-23
AU593889B2 (en) 1990-02-22
US4833680A (en) 1989-05-23
EP0237922A3 (en) 1991-02-27
DE3786277D1 (en) 1993-07-29
DE3608930A1 (en) 1987-09-24
ES2042512T3 (en) 1993-12-16
AU6982987A (en) 1987-09-24

Similar Documents

Publication Publication Date Title
US4782243A (en) Pulse generator
US4902862A (en) Keyboard switch device for facilitating removal and replacement of push buttons
US6057522A (en) Keyswitch of multiple-width key
US5138121A (en) Auxiliary contact mounting block
US4900275A (en) DIN rail mountable circuit breaker
US4121065A (en) Toggle switch lever lock
US3962556A (en) Keyboard with versatile switch support structures
JPS6334180Y2 (en)
US4345121A (en) Miniature lighted pivoted actuator switch with integral lock
US3288973A (en) Push-push switch convertible to momentary switch
CA2234872C (en) A child resistant switch lock
US3337702A (en) Non-defeat double snap-acting switch with oscillating contact
US4314113A (en) Keyswitch having contacts mounted on cantilever beams
US5747758A (en) Keyboard arrangement
JP2005085762A (en) Toggle switch and manufacturing method of toggle switch
US3427418A (en) Silent a.c. switch utilizing a coil spring coacting with abutment to provide a cushioned effect
US5070218A (en) Key guide apparatus for electronic musical instrument
US4119821A (en) Normally closed switch
US3832508A (en) Micro-lever switch operator
US3487184A (en) Overtravel mechanism for snap-action switch
US4152556A (en) Noise suppression pushbutton interlocked switch assembly
KR980010688A (en) Shift knob structure
JPS5979916A (en) Electric switch used for latch mechanism or like of deck lead of vehicle
US3482064A (en) Electrical switch having pressure contacts
US4282596A (en) Alarm clock case shut-off device

Legal Events

Date Code Title Description
AS Assignment

Owner name: STANDARD ELEKTRIK LORENZSTRASSE 10 7000 STUTTGART-

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNORS:ROSL, WOLFGANG;ROSE, JOCHEN;REEL/FRAME:004814/0036

Effective date: 19871104

REMI Maintenance fee reminder mailed
LAPS Lapse for failure to pay maintenance fees
FP Lapsed due to failure to pay maintenance fee

Effective date: 19921101

STCH Information on status: patent discontinuation

Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362